difference between a primary key and a unique key?differencebetween a primarykey and a unique key? What's the differencebetween a primarykey and a unique key?
Hi,
The column holding the primarykey constraint cannot accept
null values.whereas column holding

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Mysql add primary keyMysql add primarykeyMysql add PrimaryKey is used to add primarykey on the column... of this tutorial illustrate an example from 'Mysql Add
PrimaryKey'. To understand

Mysql Alter Table Primary KeyMysql Alter Table PrimaryKeyMysql Alter Table PrimaryKey is used to remove the primarykey from the
table and add primarykey to the existing other column of table

How to auto increment primary key in mysql...
How to auto increment primarykey in mysql... How to auto increment primarykey in mysql...
and one more thing i need to get auto increment value in front end each time for inserting the value[JSP

Difference between Mysql and SQLDifferencebetweenMysql and SQL hello,
What is the differencebetweenMysql and SQL??
hii,
SQL is structural quary language but mysql is database package

mysql difference between two numbersmysqldifferencebetween two numbers How to get total bate differencebetween two dates for example 1/01/2012 and 1/02/2012 in MYSQL?
&nbsp..., '01/02/2012', 103))
DATEDIFF() in MYSQL always returns the difference

What is a "primary key"?
What is a "primarykey"? What is a "primarykey"?
Hi,
Here is the answer,
A primarykey is used to uniquely identify each row... be an artificial field (one that has nothing to do with the actual record). A primarykey can

composinte primary key in hibernate
composinte primarykey in hibernate I am facing following problem,
Inside the database(mssql), i have created a table without primarykey... primarykey with all the columns of the table and hibernate s/w has created two pojo

Adding A Primary Key to an Existing Table
Adding A PrimaryKey to an Existing Table Been trying to add a primarykey to a MySQL table using Java for two days with no success. I'm new... KEY (SerialNo)");
out.println("Primarykey added

changing primary key of parent table
changing primarykey of parent table I want to change one primarykey from a table where primarykey is auto created? How can I do that? I have... to your MySQL server version for the right syntax to use near 'upate person set

SQL Primary Key
in a
database table. The PrimaryKey of the Table does not include NULL values...' with the primarykey 'user_id'.
The field name 'user_id' does not include a null value.&nbsp... users(user_id int not nullprimarykey,last_name varchar(25) not null,first_name

Create primary key using hibernate
Create primarykey using hibernate How to create primarykey using hibernate?
The id element describes the primarykey for the persistent class and how the key value is generated.
<id name="id

Mysql DifferenceMysqlDifferenceMysqlDifference is used to return the records that are the outcome of
differencebetween the records in a table.
Understand with Example
The Tutorial

Mysql DifferenceMysqlDifferenceMysqlDifference is used to return the records that are the outcome of
differencebetween the records in a table.
Understand with Example

hibernate annotations with composite primary key
to use hibernate annotations in case of composite primarykey in one table.
I tried like this, I have created a table without primarykey. By default mssql has created a composite primarykey with all the columns of the table.
table

What is the difference between MongoDB and MySql?
The differencebetween MongoDB and MySql is that the in former one whole... than MySql will work perfectly but if a data is complex and you want to store serialized arrays or JSON objects then MongoDB is advised.
MySql has JOIN